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M. MAZER Feb." 19, 1929.

ACOUSTIC PANEL Filed Jan. 19, 1928 43 uu N I NV EN TOR. Warez/ M y A TTORNE m l =1 absorbing sound is covered b schemewofsdecoration. rT-herefore', it. is es- ;sential ='to have' large panels gfrequently of the I panels throughdoor orotherjsmallopenings into the, chamber in: whichetheyl-zare to --be insta ledail f I: v

Patented Feb. 19, 1929.

* m en v. inventionprov a plurality of units or sections which comprise fihsingle unitarypanel. a

The.ipresent inventionn'e ates: i130. acoustic panels, adapted to be .mountedT int-he? ceiling and walls of: buildings :for. correcting-defects in-the acbusticsof the structure. 1 An object-of thfpresent invention is to provide a panel which: may the made-of" the desirable size for mounting on aceih'ng ;.or wall and which is-cOnSt-ructed such 1 that it may be given the desired finish of the ceiling or Wall and wherein the acoustic material for anouter layer whichformsthesurface of-the'panel. Architects. seriously object to jbreakinggup of a ceiling-or wall into--.a'a;nultiplicity--of small panels as it destroys: thelparticular same-general dimensionzas theac'ei-ling or wall,

and subsequently; mount/them or to carry the serenade ii' ibi Another object of the invention {pro- -vide a panelot suclrconstruction that it is capable OfbGlng'kI'lOC-kd-dOlVD or folded's'o as to pass through door-ways and the like into position for mounting,'-and wherein. the knocked-down or 'foldable structure of the panel is so arranged that it may be utilized in stretching and maintaining. taut the surface place; thereby retaining the est-hetic appearance of the ceiling or wall surfaces with which the architects are greatly concerned.

. such manner. that. when the-frames are spread v apart or opened the surface materlal will be stretched and held taut, and to provide panel frames which may be made in any desired-di mensions and shapes and in which may be mountedihe vfelt or other suitable acoustic material which may be used.

panel,- showingtthe thereinyandi-i our: Figure i ls alongltudinal section taken at s n ."QWith the's foregoin'g rand otherobjects in view xthe'" invention will be more fully described hereinaften'and will be more particularly pointed-out in the claims appended hereto. v a v t 111 the drawings, wherein like symbols refer to *like 'or corresponding parts throughout the severalviews," l a lF'gure 1is"an outer face elevation ofa panel'construc'ted according to the present in- --vention, afpo'rtionl of the outer surface ma- 'p'arts'zas they are stretched or spread for'use. and it is impossible to build such large Fpanels Figure 3-vis an enlarged section taken through a POItIOH of o'ne of the frames of the acoustiom'aterlalmounted through onerof the-frames of the panel at right angles to the showing in Figure 3.-

eferning' 'to the drawing 'thereis shown one form wofrpane h but it is to be understood that the panelmay be made in any. desired size and of. any desired number of sections hinged together lengthwise or transversely and which are constructed according to the particular slzeand configurations of the celling and walls to which the 'panels are to be applied. 1 covering of-the panel when the-latter isin In thepresent instance the panel is shown as compr1s1ng;.a?pa1rof'framcs 10 and ll substantially similar 1n construction. The

frame 10 is of substantially rectangular r form and provided at suitable intervals throughout its length with cross braces 12 which rest upon longltudmal-cleats' or strips 13 secured at the inner longitudinal sidesof the frame 10.

.Fittecl 'betweeuthe longitudinal strips 13 is a sheet or bodyof sound absorbing material 1a which maybejfelt or any other suitable material secured by staples 16 at its longitudinal edge portions to the-strips 13. It will be .noted that the acoustic material 14 lies across the inner faces of-the braces 12 and, as shown in Figure 4, is secured thereto by staples 17 or the lilte. Staples l8 secure the opposite ends of the acoustic material 14 to the ends of the frame 10.

For the purpose of covering the outer face of the panel and permitting the painting or otherwise treating of the panel to conform to the muml fini shpzf the rooinpirphamberga surface-layer of canvas 19 'rbth"er' s1iitable BEST AVAILABLE COP: stretched and held taut from sagging when the panel sections are swung into alinement, a feature which by heretofore practiced means has not been accomplished.

It is obvious that various changes-and modifications may be made in the details of construction and desi ir-ofithe above specificallyI-describedembodimefit of thisinvention material is stretched over the frames lOuand .Without departing from the spirit thereof,

The frames aetlll.areiiles josether in edgewise conta'ctand are s'c curedto' such changes, modifications being regethe r anene*omyby thesoin of the following by hinges or the like, which are located ac fllms toward the outer face or side of the panel so drawn taut and held in suchstretched posiition. ThecanK/as sheet 19.-is drawn tautc'rosswise ofthe-frames 110 and: '11 when the-frames are buckled, asshown inidotteddinesin Figure 2 because'whenthe frames-are stretched or swung into alinement, the longitudinal stretchingaction; on" the canvas 19 also conta'ct'sthe' canvassheet-ias'tc its width and consequently. drahvs the canvas sheet taut: in

z'botlr longitudinal?- and transversetdirections.

Thejpanel' may be'made-up of any suitable numberof' frames -10 and 11 and the frames may. be:.l1inged: together.- in: groupsiiandi :at different, sides hut-incach instance'th'e canvas layer 19 is secured across two on more bfthe frames-:ihsuch pbsitionv-thatathe canvas is alinementnff stretched; when thezfi'ames are swung into The outer surface ofi the canvasf l) aha painted or otherwise suitably treated to impart the desired surfacecoloringor coating tothe panel; so as to blend withth wall or yf be ceiling finish. 9' From Figures and 4 1t'w1ll be n'oted that the stretched.sui'facersheet'-19iis spaced from'the-felt. sheet- 1 f, and a dead air space 90 is provided between the two so as' to further. dampen --the vibrations: transmitted through the canvas sheet '19-and'into the absorbing material-14; F i

Another advantage in building the panel in sections hinged-together, is that a single panel of considerable areamay be'construeted Ioutside'of the building or chamber and may be folded orknocked-down. after construction and carried through a relatively small door:- opening or: passage into the chamber, and then spread open and stretched into position. It is obvious'tiiat'bythe above-described structure relatively large areas of canvas. in

long andyvidepanelsy mayjbe effectit ely that the panel may break inwardly praway- 3. An acoustic panel L 'J il W hat is claimed 1s 1 ,An acoustampanel COIDPIISIDQ a plurality of sections means hingedly connecting the sections together: to admit the fold- 0e the'zsect-i'ons one:upon the other,.a body ofsolind absorbing material mounted in each section, and a surfacefabric-secured over the sections of the panelysaidfabric being drawn while saidi'sections arein relatively fold- "ed on b uckled position, said sections adapted to be swung into-alinementwith one'another fOr dr-awing said surface fabric taut sand stretchingthesame. I v i 2;. acoustic panel: oomprisingaplurality of sections lnieansifor hingedly connecting: the": sections wtogetlier for swinging the sections 1 one upcin the other into 'al substantially folded? position, cross braces in the I 1 sections, longitudinal strips mounted the sections-for supporting the ends; of the cross braces; afibiidys' of sound absorbing material ino' qxnted'irf each frame between the longitudiwhiqstrips hnd zacross' saidbracem and a sun face fabric the panel secured across I the sections andflsecured taut over the sections in a direction at right angles to theanis "of the hihged l'connectibn" between thesections iforistmetching'and maintaining taut the surface material when said sections are swung into alinementl comprising frames, hinges connecting the frames together to admit the buckling and folding of the frames, "cross braces in the frames, longitudinal strips an flXQ IHIIQF'SHlGS'Of thc'frames for suppoit ing the cross st-rips soundabsorbing material "mounted iii-each frame across the braces and 'hctween' the=str1ps, and a surface fabric s'e-' cured o 'er the frames and drawn taut at 'rig'hflanfrl'es to the hinges when the-frames are buckled, whereby when said frames are swung into-alinement said surface fabric is stretched and maintained taut.

- '4'. An acoustic'panel comprising a plurality of hingedly connected sections adapted to be swung into folded' and buckled relation, asurface ffiblld secured over the outer sides of tllfiSQCtlOIlSYlIld drawn taut when the sections are in buckled relation, said sections adapted to beswung into alinement for drawingthe surfa'cematerial taut, and sound absorbing material secured in the sect-ions in spaced relation to the surface fabric to provide an air space between the fabric and the material when the Sections are flat.

5. In an acoustic panel, a border frame adapted to enclose a body of sound absorbing material, said frame comprising a plurality of hingedly connected sections adapted to be swung into folded and buckled relation, 3 surface fabric for covering the body of sound absorbing material secured over the outer 10 ides of the sections and drawn taut- When the sections are in buckled relation said sections dapted to be swung into alineinent as the frame is installed in position for drawing the surface fabric taut over the sound absorbing 15 material.

In testimony whereof I affix my signature.

MARCUS 'MAZER. 

